Title text:
In 1899, people were walking around shouting ‘23’ at each other and laughing, and confused reporters were writing articles trying to figure out what it meant.
Transcript:
Transcript will show once it’s been added to explainxkcd.com
Source: https://xkcd.com/3184/


258 = very interesting. 2 being v, you sign “very”, and then using 5 into 8 from ahead of your face/nose area for “interest” sign.
And for 84, try and sign it kinda side way. Kinda like “terrible” sign, but you would say it after crazy or whatever happened.
Like “oh really? 84!”
Ah then it’s probably a different sign language, mine does not do it like that.
I was referring to ASL, what’s your sign language?